The frequency of preventive services can vary based on age, health status, and risk factors. General guidelines include: - Pap Smears: Every three years for women aged 21-29, and every five years for women aged 30-65 if combined with HPV testing. - Mammograms: Every one to two years for women aged 40 and above, depending on individual risk factors. - Annual Check-ups: Regardless of specific screenings, an annual well-woman visit is recommended to assess overall health and update necessary preventive measures.